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Full Discussion: String replacement
Top Forums Shell Programming and Scripting String replacement Post 302278827 by reddybs on Wednesday 21st of January 2009 09:12:38 AM
Old 01-21-2009
Quote:
Originally Posted by Franklin52
With awk:

Code:
awk 'NR==2{gsub("NO","YES")}1' file

Regards

Thank you very much for the help.

But the file is not getting updated with the change.

Say for example, if the command is run, the file should be changed with the output it produces.
 

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MooseX::AttributeHelpers::Trait::String(3pm)		User Contributed Perl Documentation	      MooseX::AttributeHelpers::Trait::String(3pm)

NAME
MooseX::AttributeHelpers::String - simple string attribute SYNOPSIS
package MyHomePage; use Moose; use MooseX::AttributeHelpers; has 'text' => ( metaclass => 'String', is => 'rw', isa => 'Str', default => sub { '' }, provides => { append => "add_text", replace => "replace_text", } ); my $page = MyHomePage->new(); $page->add_text("foo"); # same as $page->text($page->text . "foo"); DESCRIPTION
This module provides a simple string attribute, to which mutating string operations can be applied more easily (no need to make an lvalue attribute metaclass or use temporary variables). Additional methods are provided for completion. If your attribute definition does not include any of is, isa, default or provides but does use the "String" metaclass, then this module applies defaults as in the "SYNOPSIS" above. This allows for a very basic counter definition: has 'foo' => (metaclass => 'String'); $obj->append_foo; METHODS
meta method_provider has_method_provider helper_type process_options_for_provides Run before its superclass method. check_provides_values Run after its superclass method. PROVIDED METHODS
It is important to note that all those methods do in place modification of the value stored in the attribute. inc Increments the value stored in this slot using the magical string autoincrement operator. Note that Perl doesn't provide analogeous behavior in "--", so "dec" is not available. append $string Append a string, like ".=". prepend $string Prepend a string. replace $pattern $replacement Performs a regexp substitution ("s" in perlop). There is no way to provide the "g" flag, but code references will be accepted for the replacement, causing the regex to be modified with a single "e". "/smxi" can be applied using the "qr" operator. match $pattern Like replace but without the replacement. Provided mostly for completeness. "chop" "chop" in perlfunc "chomp" "chomp" in perlfunc "clear" Sets the string to the empty string (not the value passed to "default"). BUGS
All complex software has bugs lurking in it, and this module is no exception. If you find a bug please either email me, or add the bug to cpan-RT. AUTHOR
Stevan Little <stevan@iinteractive.com> COPYRIGHT AND LICENSE
Copyright 2007-2009 by Infinity Interactive, Inc. <http://www.iinteractive.com> This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.10.1 2010-01-02 MooseX::AttributeHelpers::Trait::String(3pm)
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